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AST-09: Asset Discovery

AST 8 — High Identify

Automated mechanisms exist to perform asset discovery to identify Technology Assets, Applications and/or Services (TAAS) connected to organizational networks, including assets not present in existing inventories.

Code reused: In SCF 2025.4 and earlier, AST-09 was Secure Disposal, Destruction or Re-Use of Equipment. That control is now AST-22.

Control Question: Does the organization use automated mechanisms to perform asset discovery to identify Technology Assets, Applications and/or Services (TAAS) connected to organizational networks, including assets not present in existing inventories?

General (3)
Framework Mapping Values
CIS CSC 8.1 1.3
CIS CSC 8.1 IG2 1.3
CIS CSC 8.1 IG3 1.3
US (2)
Framework Mapping Values
USA Federal C2M2 2.1 ASSET-1f
USA Federal CMMC 2.0 Level 3 CM.L3-3.4.3E
EMEA (5)
APAC (4)

Capability Maturity Model

Level 0 — Not Performed

Practices are non-existent, based on the inability to demonstrate an implemented and operational capability. A reasonable person would conclude the control is not being performed.

Level 1 — Performed Informally

Asset Management (AST) domain capabilities are ad hoc and inconsistent. Capability criteria associated with this control may include: ▪ Policies, standards & procedures associated with AST domain capabilities provide limited coverage due to the depth and breadth of the existing documentation. ▪ Asset management-related activities are decentralized (e.g., a localized/regionalized function) and uses non-standardized methods to implement secure, resilient and compliant practices. ▪ Asset management is informally assigned as an additional duty to existing IT/cybersecurity personnel. ▪ Inventory of physical technology assets are assigned to individual users or teams and covers common devices (e.g., laptops, workstations and servers). ▪ IT and/or cybersecurity personnel work with business stakeholders to identify business-critical Technology Assets, Applications, Services and/or Data (TAASD). ▪ No structured process exists to review or share the results of the inventories.

Level 2 — Planned & Tracked

Asset Management (AST) capabilities are requirements-driven, but are not standardized across the entity (e.g., local/regional level consistency). Capability criteria associated with this control reasonably expect the following criteria to exist: ▪ Policies and standards associated with AST domain capabilities are formally documented and centrally-managed by the entity. ▪ Standardized Operating Procedures (SOP) associated with AST domain capabilities are documented and maintained by process owners. ▪ IT and/or cybersecurity personnel work with business stakeholders and process owners to appropriately scope and reasonably implement cybersecurity and data protection controls associated with AST domain capabilities to address applicable statutory, regulatory and/or contractual requirements for Technology Assets, Applications, Services and/or Data (TAASD). ▪ Asset management-related controls are primarily administrative and preventative in nature (e.g., policies, standards and procedures & guidelines). ▪ Asset management may be a defined function (e.g., team or department) or assigned as an additional duty to existing IT and/or cybersecurity personnel. ▪ The IT department establishes, maintains and updates an inventory that contains a listing of all organizational-owned TAASD, at a minimum covering common devices (e.g., laptops, workstations and servers). ▪ Data/process owners for business-critical assets are documented and are reviewed as part of the annual asset inventories. ▪ Annual IT asset inventories validate or update stakeholders /owners.

Level 3 — Well Defined

Asset Management (AST) capabilities are standardized across the entity for applicability to People, Processes, Technologies, Data and/or Facilities (PPTDF) to ensure consistency for Technology Assets, Applications, Services and/or Data (TAASD). Capability criteria associated with this control reasonably expect the following criteria to exist: ▪ Policies and standards associated with AST domain capabilities are formally documented and centrally-managed by the entity's Governance, Risk & Compliance (GRC) team, or similar function. ▪ Standardized Operating Procedures (SOP) associated with AST domain capabilities are well-documented and kept current by process owners. ▪ An IT Asset Management (ITAM) team, or similar function, is appropriately staffed and supported to implement and maintain AST domain capabilities. ▪ Technology is leveraged to enhance the efficiency and accuracy of ITAM operations (e.g., ITAM platform, (e.g., Configuration Management Database (CMBD) Asset Management solution). ▪ The entity's Governance, Risk & Compliance (GRC) team, or similar function, works with business stakeholders and process owners to appropriately scope and reasonably implement cybersecurity and data protection controls associated with AST domain capabilities to address Minimum Compliance Requirements (MCR) (e.g., applicable statutory, regulatory and/or contractual requirements) and Discretionary Security Requirements (DSR) (e.g., entity-required controls).

Level 4 — Quantitatively Controlled

Utilize SCR-CMM Level 3 criteria definitions: ▪ There are no defined Level 4 criteria, since it is reasonable to assume a quantitatively-controlled process is not necessary to operationalize this control. ▪ While it may be possible to develop “metrics-driven” capabilities for this control, the criteria would be organization-specific to define.

Level 5 — Continuously Improving

Utilize SCR-CMM Level 3 or Level 4 (if available) criteria definitions: ▪ There are no defined Level 5 criteria, since it is reasonable to assume a continuously-improving process is not necessary to operationalize this control. ▪ Level 5 capabilities should be considered “world-class” where the control builds on Level 4 capabilities, but are continuously improving through Artificial Intelligence (AI) and/or Machine Learning (ML) technologies. ▪ While it may be possible to develop responsive capabilities for this control through the use of AI and/or ML technologies, the criteria would be organization-specific to define.

Assessment Objectives

  1. AST-09_A01 automated asset discovery tools are deployed to identify Technology Assets, Applications and/or Services (TAAS) connected to organizational networks.
  2. AST-09_A02 the frequency at which automated asset discovery is performed is defined.
  3. AST-09_A03 the network scope covered by automated asset discovery is defined and includes all organizational network segments (e.g., wired, wireless, cloud and remote access).
  4. AST-09_A04 discovered Technology Assets, Applications and/or Services (TAAS) are compared against existing inventories to identify assets not present in the inventory.
  5. AST-09_A05 assets identified by discovery that are not present in existing inventories are investigated and either added to the inventory or removed from the network within a defined time period.

Evidence Requirements

E-AST-34 Asset Discovery Results

Documented evidence of automated asset discovery results reconciled against the asset inventory (e.g., unknown / unauthorized assets identified).

Asset Management
E-MON-04 Rogue Devices

Documented evidence of rogue device identification is included as part of the centralized event log collection and review/analysis process.

Event Log Monitoring

Technology Recommendations

Micro/Small

  • Free network scanner (e.g., Nmap, Angry IP Scanner, runZero Community)
  • Router/firewall DHCP lease review

Small

  • Network discovery tool (e.g., Lansweeper, Spiceworks, runZero)
  • Cloud provider asset inventory (e.g., AWS Config, Azure Resource Graph)

Medium

  • Automated discovery feeding the CMDB (e.g., Lansweeper, ManageEngine, Axonius)
  • Network Access Control (NAC) visibility
  • Quarterly inventory reconciliation

Large

  • Cyber asset attack surface management (e.g., Axonius, runZero, JupiterOne)
  • Network Access Control (NAC) (e.g., Cisco ISE, Aruba ClearPass)
  • Passive discovery for OT/IoT (e.g., Claroty, Nozomi, Armis)

Enterprise

  • Enterprise attack surface management with continuous discovery (e.g., Axonius, runZero, Tenable)
  • Network Access Control (NAC) with automated quarantine
  • Passive discovery for OT/IoT (e.g., Claroty, Nozomi, Armis, Dragos)
  • Automated CMDB reconciliation

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